Thread: Rally1 hybrid cars (2022-)
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12th January 2022, 09:20 #471
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Left-foot breaking is used for many reasons, as mentioned above. Third reason is the time it takes to move right foot from throttle and back just for breaking. So left-foot breaking I guess is used by every (fast) driver. Even driving RWD rallycars you perfectly can use left-foot breaking, if car has dogbox gerabox. However not at same time throttling in corners...
"Reis vas pät pat kaar vas kut"
Tommi Mäkinen, back in the years...
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12th January 2022, 09:44 #472
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I tried to explain that these are two different things
1. Using left foot to brake, but never braking and throttling at the same timebecause the cars don't need the clutch (your #3 falls into this same category).
2. "Left-foot braking" as Rauno Aaltonen invented it in the 50's, to make the car shift weight to the front wheels and thus increasing grip and helping turn-in, and also on FWD cars it would make the rear wheels possibly lock and slide while the front wheels would still have torque. Also useful for early turbo engines to keep turbo rolling but still drive at slower speed
#1 will still be useful for Rally1 cars. #2 is be a technique that will likely be used less.
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12th January 2022, 09:58 #473
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"Reis vas pät pat kaar vas kut"
Tommi Mäkinen, back in the years...
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12th January 2022, 09:59 #474
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Breen off on PET.
"Reis vas pät pat kaar vas kut"
Tommi Mäkinen, back in the years...
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12th January 2022, 10:48 #475
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So for the video as also mentioned that the boost lenth depend on the lenth of of stage ,The total energy have only 100KW, Is there have the boost difference for each boost by the ECU?
For 4KM stage, each boost have 130 HP,But for 40KM stage ,each boost have only 13 HP to saving more energy for the rest of the stage ??
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12th January 2022, 11:12 #476
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Aaltonen explained this in a podcast last year. When he got into rallying (after circuit racing) he was told to use the handbrake to get the car turned in. He found this inconvenient, since his both arms were occupied by steering wheel and gear shift. But he noticed his left foot was unoccupied, and thought about using the brake, and it worked. The main effect in those days was to lock the rear wheels and get them sliding.
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12th January 2022, 11:56 #477
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12th January 2022, 14:21 #478
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So no concerns that changes in diff set up and simpler suspension in the new cars will influence things?
Might be worth being clear for anyone new to this that left-foot weight balancing happens even where there's no obvious left or right bend in the road or need to slow down. In XYZ axes through the car steering only takes care of Z. Roads go up/downhill, have cambers, ditches, subsidence and potholes, jumps and crests, variable traction, are infinitely describable and generally want to throw a moving car about, but is more pronounced on jacked and soft suspension.
Within the context of the hybrid package it's irrelevant if you use left or right foot to slow the car. The biggest unknown is how often and how much the boost is available. We don't know if it's 150m or 5km per 15km stage, or 150m or 5km on the next 15km stage, or if there's enough to still be in use at speeds where lfb is mostly used following an acceleration assisted boost. Driving style talk may be insignificant!
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12th January 2022, 17:55 #479
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Loeb hasn't had much testing in the Puma hybrid. But he may remember driving this car from 2008 !
https://www.motorauthority.com/news/...ly-car-concept
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12th January 2022, 20:47 #480
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